Sobrevivência e crescimento de espécies pioneiras utilizada na Apa Morro do Urubu, Aracaju – SE, para fins de recuperação ambiental

Abstract

With the high suppression index of the native vegetation in Aracaju / SE, a significant picture of environmental degradation becomes evident, leading to the fragmentation of forest ecosystems. Thus, the need for recovery of these areas arises, aiming at the rescue of the local biodiversity. In this sense, this work was carried out with the objective of evaluating the growth and survival of three pioneer forest species used in the Environmental Recovery and Urban Arborization Project in the Morro do Urubu Environmental Protection Area, Aracaju / SE. The planting of the seedlings was done in a pit, with spacing of 3 mx 3 m, totaling 1,111 seedlings per hectare, alternating species of fast growth and slow growth, taking into account the dynamics of succession as to the ecological groups of the selected species . Of these, 3 pioneer species were chosen, totaling 96 seedlings, for the evaluation of growth and survival. Measurements of height (H) and neck diameter (DC) were taken during the period from the 18th to the 22nd month after planting, where the surviving individuals and the relative growth rate (TCR) were also counted. The species that presented the best survival rate was Guazuma ulmifolia (100%), followed by Enterolobium contortisiliquum (92.59%) and Anadenanthera. macrocarpa (78.26%). In the evaluation of the growth characteristics, in the field, A. macrocarpa (280.42 cm) presented higher development in height, followed by E. contortisiliquum (268.80 cm) and G. ulmifolia (236.4 cm) . Greater colon diameter was observed for E. contortisiliquum (4.88 cm) compared to G. ulmifolia (4.32 cm) and A. macrocarpa (3.44 cm). In relation to the TCR for height and diameter of the colon, the species with the highest values ​​were G. ulmifolia (36.32%) and A. macrocarpa (61.50%), respectively. The species obtained high rates of survival in the period evaluated, confirming their importance for the recovery of degraded areas.